<template>
    <div>
        <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
        <!-- 2.为Echarts定义一个具备大小（宽高的）Dom（父容器） -->
    <div id="main" style="width: 800px;height:500px;"></div>
    </el-card>
    </div>
</template>

<script>
// 1.导入echarts
import*as echarts from 'echarts'
import _ from 'lodash'

export default {
    data() {
        return {
            // 需要合并的数据
            options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
        }
    },
    created() {
        
    },
    // 此时页面上的元素已经被渲染完毕了！
    async mounted() {
        // 3.基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        //自己配置的接口数据里的折线图 
        const { data : res } = await this.$http.get('reports/type/1')
        if (res.meta.status !== 200) {
            return this.$message.error('获取折线图数据失败！')
        }
        // 4.准备数据和配置项
        const result = _.merge(res.data, this.options)
        // 5.展示数据
        myChart.setOption(result)
    },
    methods: {
        
    },
}
</script>

<style lang="">
    
</style>